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Finding the Fourth Proportional to 138,603, 207,917.46 and 45,083.64

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Solution

The fourth proportional to 138,603, 207,917.46 and 45,083.64 is: 67,629.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,603 : 207,917.46 = 45,083.64 : x
  2. Step 2: Convert to fraction form
    138,603/207,917.46 = 45,083.64/x
  3. Step 3: Cross multiply
    138,603x = 207,917.46 × 45,083.64
  4. Step 4: Simplify right side
    138,603x = 9,373,675,916.35
  5. Step 5: Solve for x
    x = 9,373,675,916.35/138,603
  6. Step 6: Final answer
    x = 67,629.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.